Trampoline Park Framing System

ABSTRACT

The invention is a system for trampoline park framing, distribution, and assembly. The trampoline parking framing system includes frame sections, coupling plates, supports, springs, material, and all the nuts and bolts needed for assembly. The invention can be designed, built, shipped, and assembled without the need to send over a support team. The frame levels itself with the tightening of the plates and the supports are adjustable to conform to uneven floor levels. The frame includes additional accessories to secure the springs to the frame sections in order to increase security of the apparatus. Also included can be safety pads or mats to cover the frame sections and the springs to reduce risk of serious injury.

FIELD OF INVENTION

The present invention relates generally to trampolines, and more particularly to trampoline parks.

Problem Statement Interpretation Considerations

This section describes the technical field in more detail, and discusses problems encountered in the technical field. This section does not describe prior art as defined for purposes of anticipation or obviousness under 35 U.S.C. section 102 or 35 U.S.C. section 103. Thus, nothing stated in the Problem Statement is to be construed as prior art.

Discussion

A trampoline typically includes a frame assembly supported on a floor by a plurality of supports. Other trampolines are supported by cords or cables and then supported by end beams and support legs. A trampoline is a jumping bed tightly stretched within an opening in the frame assembly via a plurality of spaced elastic elements. Elastic elements attach the jumping bed to the support frame.

The jumping bed is usually made out of a woven polypropylene material. The material is not elastic in itself. The elastic cords or springs provide the elasticity for the trampoline. The jumping bed is made to withstand significant force of jumpers and the polypropylene material is strong and waterproof. The jumping bed is the surface for which a person or persons can jump safely and feel the spring from the elasticity of the springs. The force of the trampoline pushes the jumper in the opposite direction from which the jumper landed. A jump down goes straight up. A jump from an angle in has the reciprocal angle out.

Recently, there is been an increased emphasis on trampoline park development and usage. Trampoline parks are a plurality of trampoline beds connected together to form a park our court. These beds can be flat, angular, and share the same frame. Some companies have used a cable method where the cable stretches across an opening between the frames and cross cables connect adjacent frames and intersect the first cable. Then the trampoline material is coupled to the cables for form the jumping zones. The problem is support of the cables and the system absorbtion of one jumper on multiple beds where the cable distributes the force through the entire cable. Other options have been cylindrical frames, but the spring connects jump off of the frame and sit on top of the frame as opposed to the side of the frame thus minimizing the spring effectiveness.

Another problem, when moving a trampoline park into a new facility, the floors are not often perfectly level, but the trampoline park needs to be level. To solve the problem, some courts design the parks from inside the facility using welds and different size support pieces to make up the difference. Many industry trampoline parks weld supports at an angle that depends on the levelness of the floor and the trampoline park. This system is costly as trampoline park manufacturers must build the frame pieces and angle supports and ship to a new location and then send in a team of workers and welders to assemble the park and weld in the supports to achieve a level set up.

There is a need to design a trampoline park system that eliminates the need for welding, an assembly team, and is easily assembled on location by one who can follow simple instructions with simple wrench tools. This invention is that system.

BRIEF DESCRIPTION OF THE DRAWINGS

Various aspects of the invention, as well as an embodiment, are better understood by reference to the following detailed description. To better understand the invention, the detailed description should be read in conjunction with the drawings and tables, in which:

FIG. 1 shows an isometric side view of the frame section.

FIG. 2 shows an isometric view of a plate.

FIG. 3 shows the side view of two frame sections connected via plates and a support connected to one of the frame sections.

FIG. 4 shows an isometric view of a plate or bracket with an upper plate section and lower plate section.

FIG. 5 shows two intersections of three of the frame sections and two supports, one with shims, the other with the adjustable support.

FIG. 6 a/6 b shows frame sections with the cylindrical rod for coupling the springs options, one rod per side or multiple rods.

FIG. 7 shows an isometric view of how three frame sections couple together and a support.

FIG. 8 shows an isometric view of a trampoline with the framing system.

FIG. 9 shows an isometric trampoline park comprised of the framing system.

EXEMPLARY EMBODIMENT OF A BEST MODE Interpretation Considerations

When reading this section (An Exemplary Embodiment of a Best Mode, which describes an exemplary embodiment of the best mode of the invention, hereinafter “exemplary embodiment”), one should keep in mind several points. First, the following exemplary embodiment is what the inventor believes to be the best mode for practicing the invention at the time this patent was filed. Thus, since one of ordinary skill in the art may recognize from the following exemplary embodiment that substantially equivalent structures or substantially equivalent acts may be used to achieve the same results in exactly the same way, or to achieve the same results in a not dissimilar way, the following exemplary embodiment should not be interpreted as limiting the invention to one embodiment.

Likewise, individual aspects (sometimes called species) of the invention are provided as examples, and, accordingly, one of ordinary skill in the art may recognize from a following exemplary structure (or a following exemplary act) that a substantially equivalent structure or substantially equivalent act may be used to either achieve the same results in substantially the same way, or to achieve the same results in a not dissimilar way.

Accordingly, the discussion of a species (or a specific item) invokes the genus (the class of items) to which that species belongs as well as related species in that genus. Likewise, the recitation of a genus invokes the species known in the art. Furthermore, it is recognized that as technology develops, a number of additional alternatives to achieve an aspect of the invention may arise. Such advances are hereby incorporated within their respective genus, and should be recognized as being functionally equivalent or structurally equivalent to the aspect shown or described.

Second, the only essential aspects of the invention are identified by the claims. Thus, aspects of the invention, including elements, acts, functions, and relationships (shown or described) should not be interpreted as being essential unless they are explicitly described and identified as being essential. Third, a function or an act should be interpreted as incorporating all modes of doing that function or act, unless otherwise explicitly stated (for example, one recognizes that “tacking” may be done by nailing, stapling, gluing, hot gunning, riveting, etc., and so a use of the word tacking invokes stapling, gluing, etc., and all other modes of that word and similar words, such as “attaching”).

Fourth, unless explicitly stated otherwise, conjunctive words (such as “or”, “and”, “including”, or “comprising” for example) should be interpreted in the inclusive, not the exclusive, sense. Fifth, the words “means” and “step” are provided to facilitate the reader's understanding of the invention and do not mean “means” or “step” as defined in §112, paragraph 6 of 35 U.S.C., unless used as “means for -functioning-” or “step for -functioning-” in the Claims section. Sixth, the invention is also described in view of the Festo decisions, and, in that regard, the claims and the invention incorporate equivalents known, unknown, foreseeable, and unforeseeable. Seventh, the language and each word used in the invention should be given the ordinary interpretation of the language and the word, unless indicated otherwise.

It should be noted in the following discussion that acts with like names are performed in like manners, unless otherwise stated. Of course, the foregoing discussions and definitions are provided for clarification purposes and are not limiting. Words and phrases are to be given their ordinary plain meaning unless indicated otherwise.

DESCRIPTION OF THE DRAWINGS

The trampoline park has developed recently with the market growing quickly across the United States. There are now over 100 trampoline parks in use in the United States. These parks are made of different frames, orientations, material, angles, trampoline designs, and accessories. The trampoline park is comprised of a court that is comprised of the flat beds and then the court is coupled to any number of angular trampoline beds. A trampoline court is a plurality of trampoline beds sharing frame sections so that the beds are coupled together or adjacent to each other.

The trampoline park framing system removes the need for extra assembly and welding. The resultant frame is a park that is easily assembled and self-leveling. Shown in FIG. 1 is the design of one frame section 110. This frame section 110 is square tubing, for example, a 4×4 inch hollow square tube made of a metal alloy such as a cast iron. Coupled to each end of the tube 110 are three sided plates 120. The plates 120 fit across the bottom each end of the tube 110 where the width of the bottom end 112 of the tube 110 equals the middle side 122 of the plates. The square frame piece 115 can be a scalable elongated piece. The range of length is restricted by the rigidity of the metal alloy and the size of the jumping area of the trampoline. The tubing can also be cylindrical, but would require adjustments to the end piece plating. The shown example is the square tube embodiment 110.

The plate 120 is coupled to the bottom end 112 of the frame section 110. In this embodiment, the plate 120 is welded onto the bottom end 112. The plate 120 maintains a 90 degree angle with the frame section bottom 114 to provide the leveling capability. Alternative coupling options include another plate option where the plate is a bracket with two section pieces, one that couples to the frame section and another that couples to other plate sections. Another option is the dual plate option, but welding one section to the bottom of the frame section. The dual plate option is in a 90 degree shape.

The frame section 110 shown has the additional spring securing rods 130. The rods 130 shown are smaller rods that are coupled to the frame section. The springs can couple to the rods 130 securing the springs and reduce the springs from disconnecting. The securing rods 130 are welded to the frame section 110 in the embodiment. The rods 130 can be bolted in alternative embodiments.

Shown in FIG. 2 is an isometric view of one of the end plates 210 that are attached to the end of the frame sections for connecting another end piece and a cross piece to enclose the corner of a trampoline bed. The plate 210 secures the frame sections together and serves the purpose for self-leveling the entire trampoline court and park. The plate 210 has a flat middle section 220 with a plurality of holes 225, shown with 4 in this embodiment. The holes 225 are for bolts to secure sections together. Each side section 230 of the plate 210 has a plurality of holes 235, 2 shown per side section 235 in this embodiment. These holes 235 are also for bolts to secure the frame to an intersecting frame section.

The design of the plate 210 is what creates the intersection and leveling of the trampoline park. When two plate middle sections connect via back to back, the sides line up to create a plate that would line up with the middle section of a third plate. The third plate would be the intersecting frame plate. Shown in FIG. 3 is a side view of two plates 320, 330 coupled where the middle sections are back to back and their accompanying frame sections 322, 332. The side section 325 of the first plate 320 line up with the side section 335 of the second plate 335 to create a four holed section that would match up with a third plate middle section and frame. When three or four sections are coupled together with these plates, the tightening of the bolts levels the intersection. A support 350 is coupled beneath the frame section 332 with the support's 350 top 355 underneath the frame section 332 supporting the weight of the frame. The support 350 is bolted to the frame section 332 via a support bracket 360. Another option is that the support is coupled a plate inside the three side of the plate so that the middle section of the plate bolts to one side of the support and the side sections of the plate bolt to the adjacent sides of the support. The bolt can couple another frame sections plate and the support.

Shown in FIG. 4 is an alternative design plate 410 or bracket that would bolt to a frame section instead of being welded to a frame section. The addition is the upper plate section 420 to bolt to the frame section. The upper plate section 420 has a first wing 430 and a second wing 440. The wings 430, 440 fit about a frame section. The frame section can have prethreaded holes, welded nuts, or open end access to allow tightening of nuts inside the frame section to affix the bolts. The first wing 430 has two bolt holes 435 to affix the upper plate section 420 horizontally to the frame section. The second wing 440 has two bolt holes 445 to add additional security when affixed to the frame section. The bottom plate piece 450 of the upper plate section 420 can have additional holes for bolts for additional security to the frame section. The bottom holes are not shown nor required but understood by those with ordinary skill in the art. The lower plate section 460 of the bracket 410 is similar to the plate shown in FIG. 2. The lower plate section 460 has 2 wings as well. The first wing 470 is shown, but the second wing is not but is similar in orientation and design as the wings or side section in FIG. 2. The middle section 462 of the lower plate section 460 has four holes 465 for securing another plate similar to the coupling fashion shown in FIG. 3. The first wing 470 has two holes 475 similar to the plate shown in FIG. 2. Those holes 475 are for securing intersection frame sections via their plate. These plate sections 410 or brackets are more easily installed, more easily shipped and easier for assembly purposes.

Shown in FIG. 5 are several coupled frame sections with supports and shims. Often times, facilities do not have level floors. The floors may be off in elevation by a few inches in the low spots versus the high spots. The trampoline park has to adjust for these inconsistencies. The trampoline court 510 levels itself with the bolts and plates, but the supports 560, 570 have to be adjustable to fit different heights. One solution is to have the same height supports 560 with additional shims 565 included to fill the gaps located in low spots in the floor where there is distance between the base of the support and the floor. This embodiment is shown in FIG. 5. The supports 560, 570 can be similar to the frames 520 such that they are of similar material and size such as the 4″×4″ square tube. The first support uses shims, but the second support leaves a gap between its base and the floor. Located in the gap is a plurality of shims 565 to fill in the gap between the support 560 and the floor thus maintaining the frames 520 level surface and eliminating a weak point in the trampoline court 510 establishing consistency throughout the trampoline park even on an un-level floor.

Also shown in FIG. 5 is the adjustable support 570. This support 570 has an inside section 575 and outside section 576 where the inside section 575 is coupled to a base 577 and slides in and out of the outside section 576. The inside section 575 drops down for low levels in the floor lengthening the support 570. Once trampoline court 510 is leveled with the plates 512 for a plurality of frame sections 520 being bolted together at intersections, the support 570 is adjusted for the height between the frame 520 and the floor. The inside section 575 of the support 570 drops to make contact with the floor and is then secured inside the outside section 576 of the support 570 with a locking pin 580 through an option of holes. The locking pin 580 is shown in FIG. 5, but alternative locking options can be substituted such as a piston, a tightening screw option, a ratchet option which can be more exact in height options. The adjustable height support is more stable and secure than the shims 565, and maintains the simplicity for trampoline park assembly and design.

Shown in FIGS. 6 a and 6 b are the preferred frame section embodiments 610, 620. FIG. 6 a is the embodiment 610 where the frame section 612 has individual loops 611 to correspond to individual springs. In FIG. 6 a, the frame section 612 includes small bars 611 used to secure the elastic elements or springs to the frame section. Individual bar sections 611 are secured to the sides of the frame section 612. Each bar section or bar loop 611 is to couple each individual spring which would be coupled to the material used for the trampoline (not shown here, but shown in a later figure). Shown in FIG. 6 a is the individual bar section 610, in FIG. 6 b is one bar per side of each frame section 620. The one bar 621 is affixed to the frame section 622 on the side and secures all of the springs for the corresponding side of material (not shown here, but shown in a later figure). The one bar option 620 allows flexibility for doubling up springs or for material with unusual coupling options. For example, if a material coupling option was for a spring every 3 inches and the loops in FIG. 6 a were for a spring every 4 inches, then there would be a problem. However, the unusual coupling option is not a problem for the bar design in FIG. 6 b. The embodiment in FIG. 6 b has only one bar, but an option with more bars can be used from 1 spring per bar to a plurality of springs per bar. For example, the embodiment could have four bar sections connected to the frame where when one bar section ends, the next one begins. When more bars are used, stability increases while the flexibility decreases. When shorter bars are used, stability decreases, but flexibility increases.

Shown in FIG. 7 is the set up for the intersection of three frame sections 710, 720, 730 showing the bolting 740 and leveling section and showing how the third intersecting frame 730 section can be coupled. The first frame section 710 bolts to the second frame section 720. The plates 711, 721 are aligned and bolted together with four bolts. The view shows that the side sections 712, 722 of the plates 711, 721 fit together to create four holes that would align with the third frame section 730 plate 731. The result would be three frame sections that are level. The support 750 is bolted together with the plate section 711 where the top of the support 750 is abutted to the bottom of the frame section 710. Longer bolts are used to couple the plates 711, 721 to the support 750.

Shown in FIG. 8 is a trampoline using the trampoline park framing system. The four frame sections 810, 820, 830, 840, the first frame section 810, second frame section 820, third frame section 830, and fourth frame section 840, are coupled together to form a polygon. The frame sections 810, 820, 830, 840 each have a support 811, 821, 841 (the third support is not shown, blocked by the trampoline material, but understood by description for those with ordinary skill in the art). The material 850 is coupled to the frame sections via springs 851. One end of each spring 851 is coupled to the material, the other end of each spring 851 hooks about the spring rods 822, 832 which are affixed to the corresponding frame sections 820, 830. When coupled together and tightened, the plates 815, 825, 835 force the frame sections 810, 820, 830, 840 to create a uniform level surface. The supports 811, 821, 841 are coupled to the frame sections 810, 820, 840 via the plates 813, 823, 843. If the floor was not level, the user could use the provided shims or use the adjustable supports (as shown in earlier figure). The frame sections 810, 820, 830, 840 can have pads coupled to the top of the frame section which cover the frame section and the springs 851. The pad covers the frame and the springs up to the trampoline material 850. The pad minimizes the risk of injury of someone falling into the frame or in between the springs 851. The pad is not shown as it would block the view of the springs and the rods, but is understood by those with ordinary skill in the art. The pad would be coupled to the frame sections.

Shown in FIG. 9 is the trampoline park 900 comprised of the trampoline park framing system. The trampoline park 900 has 6 trampoline sections 901, 902, 903, 904, 905, 906 including two angular sections 905, 906. The outer frame sections 910 only need the rods 911 on the inside of the frame section 910 to couple the springs 915. The inside frame sections 920 need the rods 921 on both sides of the frame sections 920 to secure the springs. The inside frame sections 920 couple springs 921 on both sides of the frame section 920. Two trampoline beds share one frame section to form the trampoline park. The springs could couple directly to the frame sections without the rods, but the rods add additional security. The inner and outer frame sections 910, 920 are coupled together via the plates 930. The plates 930 are bolted together to create a level frame or base frame for the trampoline park 900. The resultant frame is coupled to a plurality of supports 940 to adjust the height of the level frame.

The angular frame sections 950 are affixed to the base frame sections 910, 920 such that the angular frame sections 950 are made special beyond the regular frame sections 910, 920. The angular frame sections 950 have a base frame section 951 and the angle frame section 952. The base frame section 951 is similar to the regular frame section 910 except that the rod 957 stops at the angle intersection 956 of the base frame. There is no need to a rod where springs or material will not be located. At the angle intersection 956, a new rod 960 or rods are coupled to the inside angular frame section 952. A regular frame section 958 can couple to the peak end of the angular frame section 952 and a second angular frame section 970 to enclose a trampoline bed area which is substantially covered by the material 990. In this embodiment, the angular bed that runs from the base section up through the angular section would be one piece of material. Alternative embodiments would occur where the angular section was an attachment to the base section and the angular section would be one bed, one piece of material, coupled to the base section which would be a separate bed, another piece of material. In this embodiment, the angular frame section 950 has a cross frame section 965 that couples the angular section 952 to the base section 951 for additional support. In this embodiment, the angular frame section 952, base frame section 951, and cross frame section 965 are all one piece. They can be 3 individual pieces coupled together, but as 1 piece, the frame is stronger.

The frame section 966 that encloses the bottom of the base frame sections 951 has a spring rod 967. The rod 967 operates for springs 968 and straps 969 that are coupled trampoline material at the angle intersection to add optimum operation of the continuous bed that covers two plane levels (a flat plane and an incline plane). This feature is an option that the trampoline park framing system can embody.

The trampoline park can have the padding to cover the frames and springs as discussed along with FIG. 8. The padding is extra protection to reduce injury. The pads can be coupled with each frame section including the angular frame sections. The padding covers the inside frame sections from the trampoline material of one bed to the trampoline material of the adjacent beds to allow an individual to jump on the bed, but not fall into the frame or in between the springs.

The trampoline park can be comprised of multiple combinations of bed sections such as the embodiment discussed above. Other options include a park with multiple sides that have angular beds such as three sides. The limitation to scalability is the facility size such that a larger facility can have more than 6 of the trampoline bed sections. Also, a trampoline park can have different bed sizes composed together such that a third bed is as long as two beds combined and the two beds share their side frame sections with the longer third bed. The options allow for the flexibility to customize a trampoline park design to fit any facility.

The trampoline court framing system is a collection of frames coupled together via a plurality of plates which when bolted together create a level frame from end to end similar to a table. The frame height is accomplished by a plurality of supports. The supports have shims or are adjustable to compensate for unlevel floors of trampoline park facilities or warehouses. The trampoline court framing system can be assembled with simple ratchet and socket sets to couple the plates together via bolts and nuts. The resultant trampoline park does not need on site welding. The resultant trampoline park does not need specialized individuals to assemble. The system simplifies the trampoline parks by allowing a wholesaler to design, machine, and ship the entire park in boxes to a remote location for the owner to assemble himself. The system saves money on assembly teams and on shipping and design, because it is an adjustable system that accommodates a wide range of facilities.

The trampoline park framing system is a method of receiving facility dimensions, designing a park to fit within those dimensions, machining the frame sections with plates or brackets, the supports, the bolts, the springs and the jumping material. The trampoline park is then built as individual parts and shipped to the remote location with simple instructions and all the nuts and bolts needed and the recipient can assemble the trampoline park with a ratchet and socket set.

In concluding the detailed description, it should be noted that it will be obvious to those skilled in the art that many variations and modifications may be made to the preferred embodiment without substantially departing from the 10 principles of the present invention. All such variations and modifications are intended to be included herein within the scope of the present invention, as set forth in the following claims. 

I claim:
 1. A trampoline park framing system comprising: a plurality of frame sections wherein some trampolines share some of the frame sections; a plurality of plates, each having three sections that are a middle section with two wing sections on each opposite sides of the middle section and each of the sections of the plate having a plurality of holes and the plate is coupled to the bottom of each end of each frame section making a flush side wherein the plates are bolted together through the holes when coupling frame sections together; a plurality of bolts and nuts to couple the plate sections together coupling the frame sections; a plurality of material pieces to substantially cover the area surrounded by frame sections; a plurality of elastic elements coupling the material to the frame sections; and a plurality of supports coupled to the frame section bottom to elevate the frame sections off of a floor.
 2. The system in claim 1 wherein the elastic elements are coil springs.
 3. The system in claim 1 further comprising: a first cylindrical rod coupled to the side of the frame sections that secure the elastic elements of a first piece of material to the frame section; a second cylindrical rod coupled to the side of some of the frame sections opposite of the side of the first cylindrical rod and used to couple springs from a second piece of material to the frame.
 4. The system in claim 1 wherein the plates are welded to the end of the frame sections.
 5. The system in claim 1 wherein the supports are height adjustable.
 6. The system in claim 1 further comprising a plurality of shims that fit underneath the base of the supports to adjust the height of the support and eliminate gaps between the floor and the base of the support.
 7. A trampoline park apparatus comprising: one trampoline comprising: four frame sections coupled together to form a quadrilateral enclosing an area coupled via eight plates wherein each plate is coupled to an end of each frame section and then the plates are bolted together to secure and level the frame of the trampoline; a plurality of supports each coupled to a frame section to raise the frame section at an elevation above of a floor; a first piece of material substantially covering the enclosed area and coupled to each frame section via a plurality of elastic elements; a second trampoline comprising: three frame sections coupled together with one of the frame sections of the first trampoline to form a second quadrilateral enclosing an second area adjacent to the first trampoline via six new plates and two of the existing plates in trampoline one where each plate is coupled to an end of each frame section and the plates are then bolted together to secure and level the frame; a plurality of supports each coupled to a frame section to raise the frame to an elevation above the floor; a second piece of material substantially covering the second area and coupled to the frame sections via a plurality of elastic elements.
 8. The apparatus in claim 7 wherein the elastic elements are coil springs.
 9. The apparatus in claim 7 further comprising: four cylindrical rods each coupled to the inside of the frame sections of the first trampoline that secure the elastic elements of the first piece of material to the frame sections; four more cylindrical rods each coupled to the inside of the three frame sections and the side of the frame section that is shared with the first trampoline where the shared frame section has the cylindrical rods on each side and these four rods are used to couple springs from a second piece of material to the frame of the second trampoline.
 10. The apparatus in claim 9 wherein each of the eight cylindrical rods is a plurality of cylindrical rods forming loops and connected end to end along the frame sections for coupling elastic elements.
 11. The apparatus in claim 7 wherein the plates are welded to the end of the frame sections.
 12. The apparatus in claim 7 wherein the supports are height adjustable.
 13. The apparatus in claim 12 wherein the supports have an inside tube and an outside tube wherein the inside tube slides within the outside tube to adjust to a desired height and can be affixed at the desired height with a pin that slides through aligned holes in the sides of the inside tube and outside tube.
 14. The apparatus in claim 12 wherein the supports have and inside tube and an outside tube wherein the inside tube slides within the outside tube to adjust to a desired height and can be affixed at the desired height via a ratchet which locks the inside tube movement.
 15. The apparatus in claim 7 further comprising a plurality of shims that fit underneath the base of the supports to adjust the height of the support and eliminate gaps between the floor and the base of the support.
 16. A trampoline park apparatus comprising: a plurality of trampoline sections with material secured to frame sections via elastic elements and the trampoline sections are coupled together via plates wherein each plate is secured to the end of each frame section that comprises the trampoline and the plates are bolted together to secure and level the trampoline sections wherein the trampoline sections share at least one frame section with another trampoline section; a plurality of supports coupled to the trampoline sections to elevate the trampoline sections above a floor.
 17. The apparatus in claim 16 wherein at least one of the trampoline sections is an angle trampoline and is elevated at an incline and shares a level frame section with one of the other trampoline sections.
 18. The apparatus in claim 16 wherein the supports are height adjustable.
 19. The apparatus in claim 16 wherein the plates are brackets comprising: an upper plate section that has a plurality of holes and is coupled to the frame section; a lower plate section that has the same features as the plates with a middle section and two wing sections on each side each with a plurality of holes to be bolted to other lower plate sections of other brackets wherein the upper plate section and lower plate section are aligned at a right angle to achieve the desired leveling ability when bolted to other brackets and frame sections. 